Added support for lang (localized strings)

web/src/base.php

@@ -1,7 +1,36 @@
 <?php
 
-function s($name) {
-	echo $name;
+function strings() {
+	$lang = client_lang();
+	if (isset($GLOBALS['lang_'.$lang]))
+		return $GLOBALS['lang_'.$lang];
+	$file = 'config/lang/'.$lang.'.php';
+	if (!file_exists($file))
+		return [];
+	require_once $file;
+	if (!isset($strings))
+		return [];
+	$GLOBALS['lang_'.$lang] = $strings;
+	return $strings;
+}
+
+function s($name, $return=false) {
+	$strings = strings();
+	$key = "['".str_replace('.', "']['", $name)."']";
+	$val = eval('echo $strings'.$key.' ?? $name;');
+	if ($return)
+		return $val;
+	echo $val;
+}
+
+function client_lang() {
+	if (!isset($GLOBALS['cfg_lang'])) {
+		require_once 'config/lang.php';
+		$GLOBALS['cfg_lang'] = [ $default_lang, $supported_langs ];
+	}
+	$lang = substr(trim($_SERVER['HTTP_ACCEPT_LANGUAGE']), 0, 2);
+	return in_array($lang, $GLOBALS['cfg_lang'][1]) ?
+		$lang : $GLOBALS['cfg_lang'][0];
 }
 
 function urlargs($from = 0) {

web/src/config/lang.php

@@ -0,0 +1,7 @@
+<?php
+
+$default_lang    = 'en';
+$supported_langs = [
+	'en',
+	'es',
+];

web/src/config/lang/en.php

@@ -0,0 +1,5 @@
+<?php
+
+$strings = [
+	
+];

web/src/config/lang/es.php

@@ -0,0 +1,5 @@
+<?php
+
+$strings = [
+	
+];